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Finding the Fourth Proportional to 622.53, 859.55 and 401.61

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Solution

The fourth proportional to 622.53, 859.55 and 401.61 is: 554.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.53 : 859.55 = 401.61 : x
  2. Step 2: Convert to fraction form
    622.53/859.55 = 401.61/x
  3. Step 3: Cross multiply
    622.53x = 859.55 × 401.61
  4. Step 4: Simplify right side
    622.53x = 345,203.88
  5. Step 5: Solve for x
    x = 345,203.88/622.53
  6. Step 6: Final answer
    x = 554.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.